Expansion of high temperature creep test data for failure evaluation of BWR lower head in severe accident

Since the Fukushima Daiichi nuclear power plant accident, we have been developing a failure evaluation method that considers creep damage mechanisms using detailed three-dimensional finite element analysis model of lower head including penetration, stub tubes, and weld parts, etc., for the early com...

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Autores principales:	Yoshihito YAMAGUCHI, Jinya KATSUYAMA, Yoshiyuki KAJI, Masahiko OSAKA, Yinsheng LI
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2020
Materias:	fukushima daiichi severe accident uni–axial tensile and creep test creep constitutive law Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/50bae0b989b147d69ad24f686800aff9
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spelling	oai:doaj.org-article:50bae0b989b147d69ad24f686800aff92021-11-29T05:56:31ZExpansion of high temperature creep test data for failure evaluation of BWR lower head in severe accident2187-974510.1299/mej.19-00560https://doaj.org/article/50bae0b989b147d69ad24f686800aff92020-01-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/7/3/7_19-00560/_pdf/-char/enhttps://doaj.org/toc/2187-9745Since the Fukushima Daiichi nuclear power plant accident, we have been developing a failure evaluation method that considers creep damage mechanisms using detailed three-dimensional finite element analysis model of lower head including penetration, stub tubes, and weld parts, etc., for the early completion of the decommissioning of the nuclear power plants in Fukushima Daiichi. For the finite element analysis, we have been obtaining material properties for which no data are provided in existing databases or in the literature. In particular, creep data corresponding to the high temperature region near the melting point of materials is important in evaluating creep deformation under severe accident conditions. In this study, we obtained the uniaxial tensile and creep properties for low-alloy steel, stainless steel, and Ni-based alloy. In particular, creep test data with long rupture times at high temperatures are expanded using a tensile test machine that can measure the elongation of test specimens in a noncontact measurement system. The parameters related to the failure evaluation were improved on the basis of the expanded creep database.Yoshihito YAMAGUCHIJinya KATSUYAMAYoshiyuki KAJIMasahiko OSAKAYinsheng LIThe Japan Society of Mechanical Engineersarticlefukushima daiichisevere accidentuni–axial tensile and creep testcreep constitutive lawMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 7, Iss 3, Pp 19-00560-19-00560 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	fukushima daiichi severe accident uni–axial tensile and creep test creep constitutive law Mechanical engineering and machinery TJ1-1570
spellingShingle	fukushima daiichi severe accident uni–axial tensile and creep test creep constitutive law Mechanical engineering and machinery TJ1-1570 Yoshihito YAMAGUCHI Jinya KATSUYAMA Yoshiyuki KAJI Masahiko OSAKA Yinsheng LI Expansion of high temperature creep test data for failure evaluation of BWR lower head in severe accident
description	Since the Fukushima Daiichi nuclear power plant accident, we have been developing a failure evaluation method that considers creep damage mechanisms using detailed three-dimensional finite element analysis model of lower head including penetration, stub tubes, and weld parts, etc., for the early completion of the decommissioning of the nuclear power plants in Fukushima Daiichi. For the finite element analysis, we have been obtaining material properties for which no data are provided in existing databases or in the literature. In particular, creep data corresponding to the high temperature region near the melting point of materials is important in evaluating creep deformation under severe accident conditions. In this study, we obtained the uniaxial tensile and creep properties for low-alloy steel, stainless steel, and Ni-based alloy. In particular, creep test data with long rupture times at high temperatures are expanded using a tensile test machine that can measure the elongation of test specimens in a noncontact measurement system. The parameters related to the failure evaluation were improved on the basis of the expanded creep database.
format	article
author	Yoshihito YAMAGUCHI Jinya KATSUYAMA Yoshiyuki KAJI Masahiko OSAKA Yinsheng LI
author_facet	Yoshihito YAMAGUCHI Jinya KATSUYAMA Yoshiyuki KAJI Masahiko OSAKA Yinsheng LI
author_sort	Yoshihito YAMAGUCHI
title	Expansion of high temperature creep test data for failure evaluation of BWR lower head in severe accident
title_short	Expansion of high temperature creep test data for failure evaluation of BWR lower head in severe accident
title_full	Expansion of high temperature creep test data for failure evaluation of BWR lower head in severe accident
title_fullStr	Expansion of high temperature creep test data for failure evaluation of BWR lower head in severe accident
title_full_unstemmed	Expansion of high temperature creep test data for failure evaluation of BWR lower head in severe accident
title_sort	expansion of high temperature creep test data for failure evaluation of bwr lower head in severe accident
publisher	The Japan Society of Mechanical Engineers
publishDate	2020
url	https://doaj.org/article/50bae0b989b147d69ad24f686800aff9
work_keys_str_mv	AT yoshihitoyamaguchi expansionofhightemperaturecreeptestdataforfailureevaluationofbwrlowerheadinsevereaccident AT jinyakatsuyama expansionofhightemperaturecreeptestdataforfailureevaluationofbwrlowerheadinsevereaccident AT yoshiyukikaji expansionofhightemperaturecreeptestdataforfailureevaluationofbwrlowerheadinsevereaccident AT masahikoosaka expansionofhightemperaturecreeptestdataforfailureevaluationofbwrlowerheadinsevereaccident AT yinshengli expansionofhightemperaturecreeptestdataforfailureevaluationofbwrlowerheadinsevereaccident
_version_	1718407584095928320

Expansion of high temperature creep test data for failure evaluation of BWR lower head in severe accident

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